Donald Trump Can Take a Joke Only So Far

Self-deprecating humor seems hard for him to swallow.

Trump seemed undeterred when the crowd started booing, saying he couldn't tell whether they were booing him or Clinton.

Thursday night's dinner wasn't even the only recent example of Trump’s having trouble taking jokes in stride.

It's hard for some people -- perhaps including Trump himself -- to laugh at the Republican nominee and the election in general because the stakes are so high.

And even some of Trump’s supporters are having trouble seeing the funny.

"It's really not funny because this election is not funny,” the younger Baldwin said. “It's really serious.”